Puddling-furnace



(No Model.) 2 Sheets-Sheet 1.

H. B. HALL.

PUDDLING FURNACE.

No. 472,759. Patented Apr. 12, 1892.

INVENTOR 2 Sheets--Shee t 2.

(N6 Model.)

. H. B. HALL. PUDDLING FURNACE.

No. 472,759. Patented Apr. 12, 1892.

INVENTOR.

WITNESSES.

n4: mums PEYERS cm. PNDTO-L1THD., WASHINETON, n. c.

'dling-chamber, so as to produce a charge of rares- UNrTn HENRY B. HALL, OF HERO, PENNSYLVANIA.

PUDDLING- FURNACE.

SPECIFICATION forming part of Letters Patent NO. 472,759, dated April 12, 1892. Application filed July 16, 1890- Serial No. 353,914. (No model.)

To all whom, it may concern.-

Be it known that I, HENRY B. HALL, a citizen of the United States, residing at Hero, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Puddling-Furnace, of which the following is a specification.

My invention relates to improvements in pig-boiling or puddling furnaces, preferably, but not necessarily, heated by gas; and the objects of my improvements are as follows, viz: first, to promote the conservation of heat by providing two alternately-operating melting-chambers,in which the pig-iron is melted preparatory to being puddled in a puddlingchamber; second, to economize in time by providing two melting-chambers, one or the other of which operates simultaneously with a pudmelted iron in one and the other meltingchambers alternately with the same heat by which the metal in the puddling-chamber is worked, so that a practically-continuous operation of the puddling-chamber-that is, one that is necessarily interrupted only by repairs-can be effected; third, to reduce the size and cost of the furnace and to facilitate its operation by locating the checker-work above ground and between the walls of the furnace; fourth, to facilitate the control of the furnace by devising a compact arrangement of its lines and dampers.

My invention consists in the hereinafterdescribed mechanism for accomplishing these objects, and is succinct-1y specified in my claims.

In the accompanying drawings, Figure 1 is a front elevation of my furnace. Fig. 2 is a central longitudinal vertical section of the same. Fig. 3 is a vertical section on the line so a: of Fig. at. 'Fig. 4 is a horizontal section through the melting and puddling chambers of the furnace and illustrates the plan thereof.

Referring to the letters on the drawings, d (Z d and e e 6 indicate the outer and inner walls, respectively, of my furnace.

On opposite ends of the furnace are provided fiues N and N N, which, through the common flue P, by means of the fines O and O 0, respectively, communicate with the stack Q, by which a sufficient draft through the fiues is produced.

L and L L indicate valves,and M and M M dampers to the flues N and N N, respectively. The valves serve to exclude the outside air from'the fines, and the dampers more especially to shut off the draft within the tines themselves.

Between the outer and inner Walls of the ends, in what might be called the legs of the furnace, above the ground, is located in each end a system of checker-Work n 'n '21. Above and a little to one side of them, so as to leave passages g and g g, respectively, and fines h are carried upon the inside walls of the furnace and the walls of the puddlingchamber, melting-chambers T and T T, which are composed of outer side walls that are practically continuations of the inner walls e and e 6, respectively, of the furnaceand of the inner side walls f and f f and bottom plates m m. These melting-chambers are preferably oblong in shape.

Below the level of the melting-chambers is carried apuddling-chamber,preferablynearly 7 5 cylindrical in shape and having regularlyrounded sides, whereby the operation of pu-ddling and of keeping the chamber in repair may be more easily and expeditiously accomplished. The walls of this chamber are prac-' 8o tically continuations of the inner side walls of the meltin g-chambersf and f f, respectively, and are so lettered in the drawings.

m designates the bottom plates of all th chambers.

The melting-chambers are provided with doors j and jj, respectively, and the puddlingchamber with doors K. Each of the meltingchambers is provided at its opposite end with a trough R and R R, which, by means of the doors j and jj, the spouts S and S S, and the doors K, establish communication between the melting-chambers and the puddling-chambe-r.

J and J J indicate platforms constructed to facilitate access to the melting-chamber.

z' indicates the locations of gas-jets, which may be supplied by any suitable means, which are shown as consisting of pipes or tubes leading to the melting-chamber. The matter of location of the jets and the fuel employed, however, are not essential in practice.

It will be observed that the top F of the furnace over the puddling-chamber is depressed or dished in order to deflect the products of combustion directly against the metal in the'char'nber. D designatesa shaft that is carried in suitable bearings, which are located in the top of the chamber, the spider G and a beam A of the building under which the furnace is built. Atthe lower end of this shaft is a tool V. This shaft is operated by cog-Wheels a and b, a shaft 0, and belt B. These elements form nopart of my hereindescribed invention, and are only illustrated incidently.

In operation, supposing that one of the melt-- the space 9 9 over the melting-chamber 'l T,-

theproducts of' combustion. melt the pig'in that chamber andpass out through the flues N N, O O, P, and the stack Q. By the time the operation'of puddling is completed in the chamber U and the metal ready to be drawn; the pig in the chamber T T is ready to be introduced into the chamber U, so that by a reversal of the operation j ust' described-that is, charging the chamber T, closing the valve L and t-he'damp'er M and M, and opening the v'alve'IJ'L and the'damper M, extinguishing thejets i, and igniting thejets at 2' t-the operation can be repeated, as before, thecha'm'ber U. having been previously supplied with the charge'of melted pig from the chamber T T,

which is drawn directly from the meltingchamber through the trough R R and the spout SS into the paddling-chamber. It will be perceived from this description that the operation is practically continuous andcan be carried on so longas the condition of the chambers will permit. No cessation is required, except for the purpose of repairing and keeping the chambers in proper condition. It was'stated before that in the beginning the puddling-chamber was provided with a proper charge. This may be, in the first instance, produced by a proceeding, as in the operation first above described; but, if de: sired, with the exception that the jets at $1 instead of those att' are ignited, and consequently heat sufficient to melt the pig in the chamber T T is produced without having to pass through and unnecessarily heat the empty puddling-chamber.

hat I claim is v 1. In a furnace, the combination of a puddling-chamber having doors on opposite sides, melting-chambers on opposide sides of said puddling: chamber, said melting-chambers having communication with thestack' of the furnace through flues, as described, and having communication with the puddling chamber through openings 9 and g g for the passage of air, troughs Rand RR, and spouts S and S S, connecting said melting-chambers with said puddling-chamber'and serving to conduct the metal from' the one to the other, and means for heating said melting-chambers and puddling-chamber.

2. The combination of melting-chambers having doors, apuddling-chamber between said melting-chambers, doors leading thereto, troughs andspouts connecting said puddlingchamber with both of said melting-chambers, ducts from each of the melting-chambers to the puddling chamber, a source of heat consisting of a fuel-pipe leading to the puddlingchamber, flues leading tosaid melting-chambers, means for opening and closing said flues, and a stack communicating with said fines, substantially as specified.

HENRY B. HALL. \Vitnesses:

H. L. CASTLE, JAMES M. NEVIN. 

